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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Repair Instructions >> Water Pump Replacement (LUK) >> Removal Procedure

Removal Procedure

  1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  2. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  3. Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement (LUK) .
  4. If equipped, remove the coolant heater.
  5. Remove the catalytic converter. Refer to Catalytic Converter Replacement (LUK, LEA) .
  6. Remove the engine coolant thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement (LEA or LUK) .
    7. Fig 1: Water Pump Cover, Fasteners And Gasket
    GM2637652Courtesy of GENERAL MOTORS COMPANY
  7. Remove the water pump cover (2), fasteners (3) and gasket (1) from the engine front cover.
    8. Fig 2: Locating Water Pump Drain Plug
    GM964352Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    A drain plug has been provided at the bottom of the water pump assembly for additional coolant drainage from the engine block and water pump.

  8. Drain the coolant from the water pump using the plug at the bottom of the pump. Install the plug when finished.
    9. Fig 3: Water Pump Holding Tool And Fasteners
    GM2637656Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The water pump holding tool supports the sprocket and chain during water pump service. The tool must be used or the balance shaft must be re-timed.

  9. Align the EN-43651  water pump holding tool (1) with the threads on the water pump sprocket. Tighten the water pump holding tool fasteners (2).
    10. Fig 4: Water Pump Cover Fasteners
    GM2637660Courtesy of GENERAL MOTORS COMPANY
  10. Secure the water pump holding tool with the previously removed water pump cover fasteners (1) into the engine front cover.
    11. Fig 5: Water Pump Sprocket To Water Pump Fasteners
    GM2637663Courtesy of GENERAL MOTORS COMPANY
  11. Remove the water pump sprocket to water pump fasteners (1).
    12. Fig 6: Water Pump Bolts
    GM2442866Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Be sure to remove both water pump bolts from the front of the engine block.

  12. Remove the front water pump fasteners (1).
    13. Fig 7: Identifying Rear Water Pump Bolts
    GM1578334Courtesy of GENERAL MOTORS COMPANY
  13. Remove the rear water pump fasteners (1).
    14. Fig 8: Water Pump
    GM2637665Courtesy of GENERAL MOTORS COMPANY
  14. Remove the water pump (1).
    15. Fig 9: Water Pump, Water Pump Cover, Rear Cover Fasteners And O-Ring Seal
    GM2637669Courtesy of GENERAL MOTORS COMPANY
  15. If replacing the water pump cover remove the water pump rear cover fasteners (4).
  16. Separate the water pump cover (1) from the water pump (3).
  17. Remove and discard the water pump O-ring seal (2).
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